This was an idea I had a few months ago that I just had to build. I was building for a few days straight and I was so inspired I had issues sleeping and paying attention in classes and raids. It was built 90% in 3-4 days, then slowly reworked and perfected (or at least built up to my standard; I could work a bit harder on this and bring it closer to the original set, but it was a bit out of my effort range) over about a week or two. After that it waited for about 3 months for me to get around to building the original Toa Onua to have a side-by-side photo (Shoutout to my non-FOL ninja mrga friend for lending the second Pakari mask and a replacement for a broken arm).

This was very much the kind of building I enjoy the most (minus fragility, which comes naturally and is hardly avoidable). Fiddling with complicated compact shapes, many neck brackets... While recreating a pre-existing shape or concept is not my thing, but as I have a soft spot for G1 bonkles, I made an exception.

This build was recreated more piece by piece than as a whole, so checking out the Bricksafe folder helps with maximum appreciation of the MOC's complexity.

It's so beautiful. Now you just need to make the mask out of more than one part. Have fun :P
Inb4 response: oh, someone already suggested that. Umm, darn, I need a way to make this not awkward, uh....SMOKEBOMB

Quoting Marin Stipkovic
Fantastic stuff. Now all that's left to be brick-built is the mask. ;)

It was an intentional decision not to do it. I love Kanohi masks, especially first generation. Secondly, while Onua's mask may be the easiest to make, it would not have looked close enough. I might make it as a bonus upload since you asked. Maybe I am wrong, maybe it will look great.